†Pentaphyllum de Koninck 1872 (horn coral)
Anthozoa - Stauriida - Pentaphyllidae
Parent taxon: Pentaphyllinae according to D. Hill 1981
Sister taxa: Antikinkaidia, Carinotachylasma, Cystelasma, Oligophyllum, Pentamplexus, Tachylasma
Subtaxa: Pentaphyllum antractum, Pentaphyllum breviseptum, Pentaphyllum cuneatum, Pentaphyllum excentricum, Pentaphyllum leptoconicum, Pentaphyllum minimum, Pentaphyllum permicum, Pentaphyllum subcylindricum
Ecology: stationary epifaunal suspension feeder